The number of undocumented immigrants in the United States: Estimates based on demographic modeling with data from 1990 to 2016 Fazel-Zarandi, Mohammad M. ; Feinstein, Jonathan S. ; Kaplan, Edward H. Abstract Publication: PLoS ONE Pub Date: September 2018 DOI: 10.1371/journal.pone.0201193 Bibcode: 2018PLoSO..1301193F